Section 101(1)(a) in The Rajasthan Building and Other Construction Workers (Regulation of Employment and Conditions of Service) Rules, 2009
(a)fixed lifting appliances are installed-(i)by competent persons;(ii)in a manner that such appliances cannot be displaced by the load, vibration or other influences;(iii)in manner that the operator of such appliances is not exposed to danger from loads, ropes or drums; and(iv)in a manner that the operator can either see over the zone of operation or communicate with all loading and unloading points by signal, or ether communication system;